Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX metropolitan statistical area. Bexar county includes Government Canyon state natural area in northwestern part of the county.
If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
Many people ask  What is the detection range?  (or how far away can the camera be?). The answer depends on the size of your target species. It is best to think of it this way-imagine taking a photo of an elephant that is 100 metres away.Imagine how large the elephant would appear within the frame of your photo. Now imagine taking a photo of a mouse just 2 metres away.t is best to think of it this way-imagine taking a photo of an elephant that is 100 metres away. Imagine how large the elephant would appear within the frame of your photo. Now imagine taking a photo of a mouse just 2 metres away.